diff --git a/.github/workflows/gh-pages.yml b/.github/workflows/gh-pages.yml
index 457b0c35..ede82674 100644
--- a/.github/workflows/gh-pages.yml
+++ b/.github/workflows/gh-pages.yml
@@ -20,10 +20,10 @@ jobs:
           allow-prerelease-opam: true
 
       - name: Deps
-        run: opam install odig moonpool
+        run: opam install odig moonpool moonpool-lwt
 
       - name: Build
-        run: opam exec -- odig odoc --cache-dir=_doc/ moonpool
+        run: opam exec -- odig odoc --cache-dir=_doc/ moonpool moonpool-lwt
 
       - name: Deploy
         uses: peaceiris/actions-gh-pages@v3
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index b7f5dbb7..157b43d7 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -20,7 +20,7 @@ jobs:
         ocaml-compiler:
             - '4.08'
             - '4.14'
-            - '5.0'
+            - '5.1'
 
     runs-on: ${{ matrix.os }}
     steps:
@@ -32,7 +32,10 @@ jobs:
           dune-cache: true
           allow-prerelease-opam: true
 
+      - run: opam install -t moonpool moonpool-lwt --deps-only
+        if: matrix.ocaml-compiler == '5.1'
       - run: opam install -t moonpool --deps-only
+        if: matrix.ocaml-compiler != '5.1'
       - run: opam exec -- dune build @install
       - run: opam exec -- dune runtest
       - run: opam install thread-local-storage trace